Engine acts like it is vapor locking.. Can Mow 30 minutes then engine shuts down sounds like running out of fuel. Already cleared the gas cap vent just to be sure. If you wait just 1-2 Minutes it fires right back up. But will not hold a load can only drive not cut. If I wait till it cools down I can cut 30 minutes again. Changed fuel filter but not with a craftsman filter. My old fuel line fron filter to carb just fell apart so I did replace that.
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Don't know what kind if engine you have but many have low oil shut down float switches inside the engine..when operating on hills or side if hills too long the oil will flow to the low side and the low oil switch will pick it up as low oil and shut it down..look for a small wire attached to the crankcase it most likely is that low oil switch..the next time this happens try disconnecting it and tape the end if the wire..try starting and run on the hill..it should not shut Down..just remember it is a safety switch to protect the engine from damage from low oil operation.try running the hills where the oil runs to the wire side of the engine..won't trick the low oil alert...Good luck..
When it starts cutting out and you turn off the PTO, how long do you have to wait until it can be turned on again? It sounds as if your PTO is overheating and loading down the engine. Run the mower for about 10 minutes, shut it off, and carefully feel the PTO housing. Resume cutting and repeat after it starts cutting out.
Replacing it is not as simple as changing the spark plug, but does not require an advanced degree.
Had exact same problem after driving 120 miles in Florida heat. After 30 minutes started but ran rough for a day and now seem fine. Thought at first fuel filter or dirty gas. Going to replace filter anyway. Is this a common problem?
Check your manual to see if it call for premium or regular. Premium has less energy per gallon and is designed for higher compression engines. What makes it "premium" is more anti-knock compounds - not better quality or performance. Sounds like a vapor lock problem that resolves as the engine cools. Regular gas may help with that.
If the temperature is exceeding 210 degrees you are at risk for overheating your truck and it shutting down is a good thing. If it is exceeding this temperature range, buy a new thermostat (very inexpensive and easy to change) located where the main radiator hose enters the engine block. This will also help keep your temps under control and if you have never changed one before on this truck, it's time to do so anyway. If the problem is happening before 210 degrees......I'm not really sure what the problem could be except that the heat coming off the engine is vaporizing the fuel before it hits the cylindars thus causeing to act like it is starving for fuel.
Sounds like fuel vapor lock. When fuel is heated, it will change from liquid to gas.... gas bubbles don't feed very well through injectors or throttle bodies.
Inspect your metal fuel lines under the hood, most likely. See if a metal hose is touching the engine, especially the near or on the exhaust manifold. You might want to insulate the fuel lines (Lowe's or Home Depot $4) with pipe insulation.
I have a 7 year-old craftsman mower with a 22 HP Briggs engine that has the same issue. After about an hour, the mower acts as if it is starving for fuel and then stalls. Then after about 5 minutes of sitting, it will run for a little while longer.
If your engine is similar to mine, then its carb has a fuel shut off solenoid which shuts off fuel to the Main Jet when Voltage is removed to prevent backfiring when the key is shut off.
Unfortunately, this solenoid can also cause the carb to starve for fuel when not working properly. In my case, when I cleaned the solenoid and the solenoid's connections, the tractor had no problem after that.
when they went to fuel injection the fuel that was not used returned to the tank thus cooling the fuel and ending vapor lock, my question is did you do a fuel pressure test? and di you do a fuel leak down test? and the first thing I would do is change the fuel filter. with ethanol in the gas it kills the filter. I have to replace mine every three months they just plug up from that junk. Other than that the only other thing would be a coil breaking down when it gets hot the coil shorts out when cool it starts so check those things first. be sure fuel pressure is 50 to 60 PSI and does not drop below 30 PSI for at least a minute, if it does the fuel pump check valve is bad, also the fuel sock could be bad as well.